... distance words by P(W), P(XIW), and P(W)P(X[W), the correction candidates become as follows, sorted by P(W ): t~ ~ []~ tt~ ~ sorted by P(XIW ): tt~ ~ ~ tt~ []~ sorted by P(W) P(XIW ): ~ tt~Y ... occurs (Church and Gale, 1991; Mays et al., 1991; Golding and Schabes, 1996). Similar techniques are used for correcting the output of English OCRs (Tong and Evans, 1996) and English speech ... quality photocopies, and faxes are still difficult to process and cause many errors. The accu- racy of handwritten OCR is still about 90% (Hilde- brandt and Liu, 1993), and it worsens dramatically...